22371f45f7ff18f8fcd6eb8474729586c4b26fbe
[paraslash.git] / audiod.c
1 /*
2 * Copyright (C) 2005-2006 Andre Noll <noll@mathematik.tu-darmstadt.de>
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
17 */
18
19 /** \file audiod.c the paraslash's audio daemon */
20
21 #include <sys/time.h> /* gettimeofday */
22 #include "para.h"
23
24 #include "audiod.cmdline.h"
25 #include "list.h"
26 #include "close_on_fork.h"
27 #include "recv.h"
28 #include "filter.h"
29 #include "grab_client.cmdline.h"
30 #include "grab_client.h"
31 #include "ringbuffer.h"
32
33 #include "error.h"
34 #include "audiod.h"
35 #include "net.h"
36 #include "daemon.h"
37 #include "string.h"
38
39 /** define the array of error lists needed by para_audiod */
40 INIT_AUDIOD_ERRLISTS;
41 /** define the array containing all supported audio formats */
42 DEFINE_AUDIO_FORMAT_ARRAY;
43
44 /**
45 * the possible modes of operation
46 *
47 * - off: disconnect from para_server
48 * - on: receive status information from para_server and play the audio stream
49 * - sb: only receive status information but not the audio stream
50 */
51 enum {AUDIOD_OFF, AUDIOD_ON, AUDIOD_STANDBY};
52
53 /** defines how to handle one supported audio format */
54 struct audio_format_info {
55 /** pointer to the receiver for this audio format */
56 struct receiver *receiver;
57 /** the receiver configuration */
58 void *receiver_conf;
59 /** the number of filters that should be activated for this audio format */
60 unsigned int num_filters;
61 /** pointer to the array of filters to be activated */
62 struct filter **filters;
63 /** pointer to the array of filter configurations */
64 void **filter_conf;
65 /** output of the last filter is written to stdin of this command */
66 char *write_cmd;
67 /** do not start receiver/filters/writer before this time */
68 struct timeval restart_barrier;
69 };
70
71 /**
72 * describes one instance of a receiver-filter-writer chain
73 *
74 * \sa receier_node, receiver, filter, filter_node, filter_chain_info
75 */
76 struct slot_info {
77 /** number of the audio format in this slot */
78 int format;
79 /** the file descriptor of the writer */
80 int write_fd;
81 /** the process id of the writer */
82 pid_t wpid;
83 /** time of the last successful read from the receiver */
84 struct timeval rtime;
85 /** time the last write to the write fd happend */
86 struct timeval wtime;
87 /** writer start time */
88 struct timeval wstime;
89 /** did we include \a write_fd in the fdset */
90 int wcheck;
91 /** set to one if we have sent the TERM signal to \a wpid */
92 int wkilled;
93 /** the receiver info associated with this slot */
94 struct receiver_node *receiver_node;
95 /** the active filter chain */
96 struct filter_chain_info *fci;
97 };
98
99 static struct slot_info slot[MAX_STREAM_SLOTS];
100
101 /** defines one command of para_audiod */
102 struct audiod_command {
103 /** the name of the command */
104 const char *name;
105 /** pointer to the function that handles the command */
106 int (*handler)(int, int, char**);
107 /** one-line description of the command */
108 const char *description;
109 /** summary of the command line options */
110 const char *synopsis;
111 /** the long help text */
112 const char *help;
113 };
114
115 extern const char *status_item_list[NUM_STAT_ITEMS];
116
117 static int com_grab(int, int, char **);
118 static int com_cycle(int, int, char **);
119 static int com_help(int, int, char **);
120 static int com_off(int, int, char **);
121 static int com_on(int, int, char **);
122 static int com_sb(int, int, char **);
123 static int com_stat(int, int, char **);
124 static int com_term(int, int, char **);
125 static int stat_pipe = -1, signal_pipe;
126
127 static struct gengetopt_args_info conf;
128 static struct timeval server_stream_start, sa_time_diff;
129 static int playing, current_decoder = -1,
130 audiod_status = AUDIOD_ON, offset_seconds, length_seconds,
131 sa_time_diff_sign = 1, audiod_socket = -1;
132 static char *af_status, /* the audio format announced in server status */
133 *socket_name, *hostname;
134 /** how many status items to remember */
135 #define RINGBUFFER_SIZE 32
136 static void *stat_item_ringbuf;
137 static FILE *logfile;
138 static const struct timeval restart_delay = {0, 300 * 1000};
139
140 static struct audio_format_info afi[] = {
141
142 [AUDIO_FORMAT_MP3] =
143 {
144 .write_cmd = "para_play",
145 },
146 [AUDIO_FORMAT_OGG] =
147 {
148 .write_cmd = "para_play",
149 },
150 };
151
152 static struct audiod_command cmds[] = {
153 {
154 .name = "cycle",
155 .handler = com_cycle,
156 .description = "switch to next mode",
157 .synopsis = "cycle",
158 .help =
159
160 "on -> standby -> off -> on\n"
161
162 },
163 {
164 .name = "grab",
165 .handler = com_grab,
166 .description = "grab the audio stream",
167 .synopsis = "-- grab [grab_options]",
168 .help =
169 "grab ('splice') the audio stream at any position in the filter \n"
170 "chain and send that data back to the client. \n"
171 "Available options:\n\n"
172 GRAB_HELP_TXT
173 },
174 {
175 .name = "help",
176 .handler = com_help,
177 .description = "display command list or help for given command",
178 .synopsis = "help [command]",
179 .help =
180
181 "When I was younger, so much younger than today, I never needed\n"
182 "anybody's help in any way. But now these days are gone, I'm not so\n"
183 "self assured. Now I find I've changed my mind and opened up the doors.\n"
184 "\n"
185 " -- Beatles: Help\n"
186
187 },
188 {
189 .name = "off",
190 .handler = com_off,
191 .description = "deactivate para_audiod",
192 .synopsis = "off",
193 .help =
194
195 "Close connection to para_server and stop all decoders.\n"
196
197 },
198 {
199 .name = "on",
200 .handler = com_on,
201 .description = "activate para_audiod",
202 .synopsis = "on",
203 .help =
204
205 "Establish connection to para_server, retrieve para_server's current\n"
206 "status. If playing, start corresponding decoder. Otherwise stop\n"
207 "all decoders.\n"
208
209 },
210 {
211 .name = "sb",
212 .handler = com_sb,
213 .description = "enter standby mode",
214 .synopsis = "sb",
215 .help =
216
217 "Stop all decoders but leave connection to para_server open.\n"
218
219 },
220 {
221 .name = "stat",
222 .handler = com_stat,
223 .description = "print status information",
224 .synopsis = "stat",
225 .help =
226
227 "Add para_audiod status information to para_server's status information\n"
228 "and dump everything to stdout.\n"
229
230 },
231 {
232 .name = "term",
233 .handler = com_term,
234 .description = "terminate audiod",
235 .synopsis = "term",
236 .help =
237
238 "Stop all decoders, shut down connection to para_server and exit.\n"
239
240 },
241 {
242 .name = NULL,
243 }
244 };
245
246 /** iterate over all slots */
247 #define FOR_EACH_SLOT(slot) for (slot = 0; slot < MAX_STREAM_SLOTS; slot++)
248 /** iterate over all supported audio formats */
249 #define FOR_EACH_AUDIO_FORMAT(af) for (af = 0; af < NUM_AUDIO_FORMATS; af++)
250 /** iterate over the array of all audiod commands */
251 #define FOR_EACH_COMMAND(c) for (c = 0; cmds[c].name; c++)
252
253 /**
254 * get the audio format number
255 * \param name the name of the audio format
256 *
257 * \return The audio format number on success, -E_UNSUPPORTED_AUDIO_FORMAT if
258 * \a name is not a supported audio format.
259 */
260 int get_audio_format_num(char *name)
261 {
262 int i;
263 FOR_EACH_AUDIO_FORMAT(i)
264 if (!strcmp(name, audio_formats[i]))
265 return i;
266 return -E_UNSUPPORTED_AUDIO_FORMAT;
267 }
268
269 /*
270 * log function. first argument is loglevel.
271 */
272 void para_log(int ll, char* fmt,...)
273 {
274 va_list argp;
275 FILE *outfd;
276 struct tm *tm;
277 time_t t1;
278 char str[MAXLINE] = "";
279
280 if (ll < conf.loglevel_arg)
281 return;
282 if (!logfile && conf.logfile_given)
283 logfile = open_log(conf.logfile_arg);
284 if (!logfile && conf.daemon_given)
285 return;
286 if (!logfile) {
287 if (ll < WARNING)
288 outfd = stdout;
289 else
290 outfd = stderr;
291 } else
292 outfd = logfile;
293 time(&t1);
294 tm = localtime(&t1);
295 strftime(str, MAXLINE, "%b %d %H:%M:%S", tm);
296 fprintf(outfd, "%s %s ", str, hostname);
297 if (conf.loglevel_arg <= INFO)
298 fprintf(outfd, "%i ", ll);
299 va_start(argp, fmt);
300 vfprintf(outfd, fmt, argp);
301 va_end(argp);
302 }
303
304 static int client_write(int fd, const char *buf)
305 {
306 size_t len = strlen(buf);
307 return write(fd, buf, len) != len? -E_CLIENT_WRITE: 1;
308 }
309
310 static char *get_time_string(struct timeval *newest_stime)
311 {
312 struct timeval now, diff, adj_stream_start, tmp;
313 int total = 0, use_server_time = 1;
314
315 if (!playing)
316 return make_message("%s:", length_seconds?
317 "" : status_item_list[SI_PLAY_TIME]);
318 if (audiod_status == AUDIOD_OFF)
319 goto out;
320 if (sa_time_diff_sign > 0)
321 tv_diff(&server_stream_start, &sa_time_diff,
322 &adj_stream_start);
323 else
324 tv_add(&server_stream_start, &sa_time_diff,
325 &adj_stream_start);
326 tmp = adj_stream_start;
327 if (newest_stime && audiod_status == AUDIOD_ON) {
328 tv_diff(newest_stime, &adj_stream_start, &diff);
329 if (tv2ms(&diff) < 5000) {
330 tmp = *newest_stime;
331 use_server_time = 0;
332 }
333 }
334 gettimeofday(&now, NULL);
335 tv_diff(&now, &tmp, &diff);
336 total = diff.tv_sec + offset_seconds;
337 if (total > length_seconds)
338 total = length_seconds;
339 if (total < 0)
340 total = 0;
341 out:
342 return make_message(
343 "%s:%s%d:%02d [%d:%02d] (%d%%/%d:%02d)",
344 status_item_list[SI_PLAY_TIME],
345 use_server_time? "~" : "",
346 total / 60,
347 total % 60,
348 (length_seconds - total) / 60,
349 (length_seconds - total) % 60,
350 length_seconds? (total * 100 + length_seconds / 2) /
351 length_seconds : 0,
352 length_seconds / 60,
353 length_seconds % 60
354 );
355 }
356
357 static char *audiod_status_string(void)
358 {
359 int i;
360 struct timeval *newest_stime = NULL;
361 char *ret, *time_string, *uptime_string, *decoder_flags =
362 para_malloc((MAX_STREAM_SLOTS + 1) * sizeof(char));
363
364 FOR_EACH_SLOT(i) {
365 struct slot_info *s = &slot[i];
366 char flag = '0';
367 if (s->receiver_node)
368 flag += 1;
369 if (s->wpid > 0)
370 flag += 2;
371 if (flag != '0')
372 flag += s->format * 4;
373 decoder_flags[i] = flag;
374 if (s->wpid <= 0)
375 continue;
376 if (newest_stime && tv_diff(&s->wstime, newest_stime, NULL) <= 0)
377 continue;
378 newest_stime = &s->wstime;
379 }
380 decoder_flags[MAX_STREAM_SLOTS] = '\0';
381 time_string = get_time_string(newest_stime);
382 uptime_string = uptime_str();
383 ret = make_message("%s:%s\n%s:%s\n%s:%s\n%s",
384 status_item_list[SI_AUDIOD_UPTIME], uptime_string,
385 status_item_list[SI_DECODER_FLAGS], decoder_flags,
386 status_item_list[SI_AUDIOD_STATUS], audiod_status == AUDIOD_ON?
387 "on" : (audiod_status == AUDIOD_OFF? "off": "sb"),
388 time_string);
389 free(uptime_string);
390 free(decoder_flags);
391 free(time_string);
392 return ret;
393 }
394
395 static char *configfile_exists(void)
396 {
397 static char *config_file;
398
399 if (!config_file) {
400 char *home = para_homedir();
401 config_file = make_message("%s/.paraslash/audiod.conf", home);
402 free(home);
403 }
404 return file_exists(config_file)? config_file : NULL;
405 }
406
407 static void setup_signal_handling(void)
408 {
409 signal_pipe = para_signal_init();
410 PARA_INFO_LOG("signal pipe: fd %d\n", signal_pipe);
411 para_install_sighandler(SIGINT);
412 para_install_sighandler(SIGTERM);
413 para_install_sighandler(SIGCHLD);
414 para_install_sighandler(SIGHUP);
415 signal(SIGPIPE, SIG_IGN);
416 }
417
418 static void audiod_status_dump(void)
419 {
420 static char *prev_status;
421 char *tmp = audiod_status_string();
422
423 if (!prev_status || strcmp(tmp, prev_status))
424 stat_client_write(tmp);
425 free(prev_status);
426 prev_status = tmp;
427 }
428
429 static void clear_slot(int slot_num)
430 {
431 struct slot_info *s = &slot[slot_num];
432
433 PARA_INFO_LOG("clearing slot %d\n", slot_num);
434 memset(s, 0, sizeof(struct slot_info));
435 s->format = -1;
436 }
437
438 static void kill_stream_writer(int slot_num)
439 {
440 struct slot_info *s = &slot[slot_num];
441
442 if (s->format < 0 || s->wkilled || s->wpid <= 0)
443 return;
444 PARA_DEBUG_LOG("kill -TERM %d (%s stream writer in slot %d)\n",
445 s->wpid, audio_formats[s->format], slot_num);
446 kill(s->wpid, SIGTERM);
447 s->wkilled = 1;
448 s->fci->error = 1;
449 }
450
451 static void set_restart_barrier(int format, struct timeval *now)
452 {
453 struct timeval tmp;
454
455 if (now)
456 tmp = *now;
457 else
458 gettimeofday(&tmp, NULL);
459 tv_add(&tmp, &restart_delay, &afi[format].restart_barrier);
460 }
461
462 static void close_receiver(int slot_num)
463 {
464 struct slot_info *s = &slot[slot_num];
465 struct audio_format_info *a;
466 struct timeval now;
467
468 if (s->format < 0 || !s->receiver_node)
469 return;
470 a = &afi[s->format];
471 PARA_NOTICE_LOG("closing %s recevier in slot %d\n",
472 audio_formats[s->format] , slot_num);
473 a->receiver->close(s->receiver_node);
474 free(s->receiver_node);
475 s->receiver_node = NULL;
476 set_restart_barrier(s->format, NULL);
477 }
478
479 static void kill_all_decoders(void)
480 {
481 int i;
482
483 FOR_EACH_SLOT(i)
484 if (slot[i].format >= 0) {
485 PARA_INFO_LOG("stopping decoder in slot %d\n", i);
486 kill_stream_writer(i);
487 }
488 }
489
490 static void check_sigchld(void)
491 {
492 pid_t pid;
493 int i;
494 struct timeval now;
495 gettimeofday(&now, NULL);
496
497 reap_next_child:
498 pid = para_reap_child();
499 if (pid <= 0)
500 return;
501 FOR_EACH_SLOT(i) {
502 struct slot_info *s = &slot[i];
503 long lifetime;
504 if (s->format < 0)
505 continue;
506 if (pid == s->wpid) {
507 s->wpid = -1;
508 lifetime = now.tv_sec - s->wstime.tv_sec;
509 PARA_INFO_LOG("%s stream writer in slot %d died "
510 "after %li secs\n",
511 audio_formats[s->format], i, lifetime);
512 set_restart_barrier(s->format, &now);
513 goto reap_next_child;
514 }
515 }
516 PARA_CRIT_LOG("para_client died (pid %d)\n", pid);
517 goto reap_next_child;
518 }
519
520 static int get_empty_slot(void)
521 {
522 int i;
523 struct slot_info *s;
524
525 FOR_EACH_SLOT(i) {
526 s = &slot[i];
527 if (s->format < 0) {
528 clear_slot(i);
529 return i;
530 }
531 if (s->write_fd > 0 || s->wpid > 0)
532 continue;
533 if (s->receiver_node)
534 continue;
535 if (s->fci)
536 continue;
537 clear_slot(i);
538 return i;
539 }
540 return -E_NO_MORE_SLOTS;
541 }
542
543 static int decoder_running(int format)
544 {
545 int i, ret = 0;
546 struct slot_info *s;
547
548 FOR_EACH_SLOT(i) {
549 s = &slot[i];
550 if (s->format == format && s->receiver_node)
551 ret |= 1;
552 if (s->format == format && s->wpid > 0)
553 ret |= 2;
554 }
555 return ret;
556 }
557
558 static void close_stat_pipe(void)
559 {
560 char *msg;
561 int i;
562
563 if (stat_pipe < 0)
564 return;
565 PARA_NOTICE_LOG("%s", "closing status pipe\n");
566 close(stat_pipe);
567 del_close_on_fork_list(stat_pipe);
568 stat_pipe = -1;
569 kill_all_decoders();
570 for (i = 0; i < RINGBUFFER_SIZE; i++)
571 free(ringbuffer_add(stat_item_ringbuf, para_strdup(NULL)));
572 dump_empty_status();
573 length_seconds = 0;
574 offset_seconds = 0;
575 audiod_status_dump();
576 playing = 0;
577 msg = make_message("%s:no connection to para_server\n",
578 status_item_list[SI_STATUS_BAR]);
579 free(ringbuffer_add(stat_item_ringbuf, msg));
580 stat_client_write(msg);
581 }
582
583 static void __noreturn clean_exit(int status, const char *msg)
584 {
585 PARA_EMERG_LOG("%s\n", msg);
586 kill_all_decoders();
587 if (socket_name)
588 unlink(socket_name);
589 if (stat_pipe >= 0)
590 close_stat_pipe();
591 exit(status);
592 }
593
594 static char *glob_cmd(char *cmd)
595 {
596 char *ret, *replacement;
597 struct timeval tmp, delay, rss; /* real stream start */
598
599 delay.tv_sec = conf.stream_delay_arg / 1000;
600 delay.tv_usec = (conf.stream_delay_arg % 1000) * 1000;
601 // PARA_INFO_LOG("delay: %lu:%lu\n", delay.tv_sec, delay.tv_usec);
602 if (sa_time_diff_sign < 0)
603 tv_add(&server_stream_start, &sa_time_diff, &rss);
604 else
605 tv_diff(&server_stream_start, &sa_time_diff, &rss);
606 tv_add(&rss, &delay, &tmp);
607 replacement = make_message("%lu:%lu", tmp.tv_sec, tmp.tv_usec);
608 ret = s_a_r(cmd, "STREAM_START", replacement);
609 free(replacement);
610 if (!ret)
611 goto out;
612 PARA_INFO_LOG("cmd: %s, repl: %s\n", cmd, ret);
613 {
614 struct timeval now;
615 gettimeofday(&now, NULL);
616 PARA_INFO_LOG("now: %lu:%lu\n", now.tv_sec, now.tv_usec);
617 }
618 out:
619 return ret;
620 }
621
622 /** get the number of filters for the given audio format */
623 int num_filters(int audio_format_num)
624 {
625 return afi[audio_format_num].num_filters;
626 }
627
628 static void open_filters(int slot_num)
629 {
630 struct slot_info *s = &slot[slot_num];
631 struct audio_format_info *a = &afi[s->format];
632 int nf = a->num_filters;
633 int i;
634
635 s->fci = para_calloc(sizeof(struct filter_chain_info));
636 INIT_LIST_HEAD(&s->fci->filters);
637 if (!nf)
638 return;
639 s->fci->inbuf = s->receiver_node->buf;
640 s->fci->in_loaded = &s->receiver_node->loaded;
641 s->fci->outbuf = s->receiver_node->buf;
642 s->fci->out_loaded = &s->receiver_node->loaded;
643 s->fci->eof = &s->receiver_node->eof;
644 for (i = 0; i < nf; i++) {
645 struct filter_node *fn = para_calloc(sizeof(struct filter_node));
646 fn->conf = a->filter_conf[i];
647 fn->fci = s->fci;
648 fn->filter = a->filters[i];
649 INIT_LIST_HEAD(&fn->callbacks);
650 list_add_tail(&fn->node, &s->fci->filters);
651 fn->filter->open(fn);
652 PARA_NOTICE_LOG("%s filter %d/%d (%s) started in slot %d\n",
653 audio_formats[s->format], i + 1, nf,
654 fn->filter->name, slot_num);
655 s->fci->outbuf = fn->buf;
656 s->fci->out_loaded = &fn->loaded;
657 }
658 PARA_DEBUG_LOG("output buffer for filter chain %p: %p\n", s->fci,
659 s->fci->outbuf);
660 }
661
662 static struct filter_node *find_filter_node(int slot_num, int format, int filternum)
663 {
664 struct filter_node *fn;
665 int i, j;
666
667 FOR_EACH_SLOT(i) {
668 struct slot_info *s = &slot[i];
669 if (s->format < 0 || !s->fci)
670 continue;
671 if (slot_num >= 0 && slot_num != i)
672 continue;
673 if (format >= 0 && s->format != format)
674 continue;
675 if (num_filters(i) < filternum)
676 continue;
677 /* success */
678 j = 1;
679 list_for_each_entry(fn, &s->fci->filters, node)
680 if (filternum <= 0 || j++ == filternum)
681 break;
682 return fn;
683 }
684 return NULL;
685 }
686
687 static void start_stream_writer(int slot_num)
688 {
689 int ret, fds[3] = {1, -1, -1};
690 struct slot_info *s = &slot[slot_num];
691 struct audio_format_info *a = &afi[s->format];
692 char *glob = glob_cmd(a->write_cmd);
693
694 PARA_INFO_LOG("starting stream writer: %s\n", glob? glob : a->write_cmd);
695 open_filters(slot_num);
696
697 ret = para_exec_cmdline_pid(&s->wpid, glob? glob : a->write_cmd, fds);
698 free(glob);
699 if (ret < 0) {
700 PARA_ERROR_LOG("exec failed (%d)\n", ret);
701 return;
702 }
703 s->write_fd = fds[0];
704 add_close_on_fork_list(s->write_fd);
705 /* we write to this fd in do_select, so we need non-blocking */
706 fcntl(s->write_fd, F_SETFL, O_NONBLOCK);
707 gettimeofday(&s->wstime, NULL);
708 current_decoder = slot_num;
709 activate_inactive_grab_clients(slot_num, s->format, &s->fci->filters);
710 }
711
712 static void open_receiver(int format)
713 {
714 struct audio_format_info *a = &afi[format];
715 struct slot_info *s;
716 int ret, slot_num;
717
718 slot_num = get_empty_slot();
719 if (slot_num < 0)
720 clean_exit(EXIT_FAILURE, PARA_STRERROR(-slot_num));
721 s = &slot[slot_num];
722 s->format = format;
723 gettimeofday(&s->rtime, NULL);
724 s->wtime = s->rtime;
725 s->receiver_node = para_calloc(sizeof(struct receiver_node));
726 s->receiver_node->conf = a->receiver_conf;
727 ret = a->receiver->open(s->receiver_node);
728 if (ret < 0) {
729 PARA_ERROR_LOG("failed to open receiver (%s)\n",
730 PARA_STRERROR(-ret));
731 free(s->receiver_node);
732 s->receiver_node = NULL;
733 return;
734 }
735 PARA_NOTICE_LOG("started %s: %s receiver in slot %d\n",
736 audio_formats[s->format], a->receiver->name, slot_num);
737 }
738
739 static int is_frozen(int format)
740 {
741 struct timeval now;
742 struct audio_format_info *a = &afi[format];
743
744 gettimeofday(&now, NULL);
745 return (tv_diff(&now, &a->restart_barrier, NULL) > 0)? 0 : 1;
746 }
747
748 static void start_current_receiver(void)
749 {
750 int i;
751
752 if (!af_status)
753 return;
754 i = get_audio_format_num(af_status);
755 if (i < 0)
756 return;
757 if ((decoder_running(i) & 1) || is_frozen(i))
758 return;
759 open_receiver(i);
760 }
761
762 static void compute_time_diff(const struct timeval *status_time)
763 {
764 struct timeval now, tmp, diff;
765 static int count;
766 int sign;
767 const struct timeval max_deviation = {0, 500 * 1000};
768 const int time_smooth = 5;
769
770 gettimeofday(&now, NULL);
771 sign = tv_diff(status_time, &now, &diff);
772 // PARA_NOTICE_LOG("%s: sign = %i, sa_time_diff_sign = %i\n", __func__,
773 // sign, sa_time_diff_sign);
774 if (!count) {
775 sa_time_diff_sign = sign;
776 sa_time_diff = diff;
777 count++;
778 return;
779 }
780 if (count > 5) {
781 int s = tv_diff(&diff, &sa_time_diff, &tmp);
782 if (tv_diff(&max_deviation, &tmp, NULL) < 0)
783 PARA_WARNING_LOG("time diff jump: %lims\n",
784 s * tv2ms(&tmp));
785 }
786 count++;
787 sa_time_diff_sign = tv_convex_combination(
788 sa_time_diff_sign * time_smooth, &sa_time_diff,
789 count > 10? sign : sign * time_smooth, &diff,
790 &tmp);
791 sa_time_diff = tmp;
792 PARA_INFO_LOG("time diff (cur/avg): "
793 "%li:%lu/%li:%lu\n",
794 sign * diff.tv_sec, (diff.tv_usec + 500) / 1000,
795 sa_time_diff_sign * sa_time_diff.tv_sec,
796 (sa_time_diff.tv_usec + 500)/ 1000);
797 }
798
799 static void check_stat_line(char *line)
800 {
801 int itemnum;
802 size_t ilen = 0;
803 struct timeval tv;
804
805 if (!line)
806 return;
807 free(ringbuffer_add(stat_item_ringbuf, para_strdup(line)));
808 stat_client_write(line);
809 itemnum = stat_line_valid(line);
810 if (itemnum < 0)
811 return;
812 ilen = strlen(status_item_list[itemnum]);
813 switch (itemnum) {
814 case SI_STATUS:
815 playing = strstr(line, "playing")? 1 : 0;
816 break;
817 case SI_FORMAT:
818 free(af_status);
819 af_status = para_strdup(line + ilen + 1);
820 break;
821 case SI_OFFSET:
822 offset_seconds = atoi(line + ilen + 1);
823 break;
824 case SI_LENGTH:
825 length_seconds = atoi(line + ilen + 1);
826 break;
827 case SI_STREAM_START:
828 if (sscanf(line + ilen + 1, "%lu.%lu",
829 &tv.tv_sec, &tv.tv_usec) == 2)
830 server_stream_start = tv;
831 break;
832 case SI_CURRENT_TIME:
833 if (sscanf(line + ilen + 1, "%lu.%lu", &tv.tv_sec,
834 &tv.tv_usec) == 2)
835 compute_time_diff(&tv);
836 break;
837 }
838 }
839
840 static void handle_signal(int sig)
841 {
842 switch (sig) {
843 case SIGCHLD:
844 return check_sigchld();
845 case SIGINT:
846 case SIGTERM:
847 case SIGHUP:
848 PARA_EMERG_LOG("terminating on signal %d\n", sig);
849 clean_exit(EXIT_FAILURE, "caught deadly signal");
850 return;
851 }
852 }
853
854 static void check_timeouts(void)
855 {
856 struct timeval now;
857 int slot_num, timeout = conf.stream_timeout_arg;
858
859 gettimeofday(&now, NULL);
860 FOR_EACH_SLOT(slot_num) {
861 struct slot_info *s = &slot[slot_num];
862 if (s->format < 0)
863 continue;
864 /* check read time */
865 if (s->receiver_node &&
866 now.tv_sec > s->rtime.tv_sec + timeout) {
867 PARA_INFO_LOG("%s input buffer (slot %d) not ready\n",
868 audio_formats[s->format], slot_num);
869 if (s->fci)
870 s->fci->error = 42;
871 else
872 close_receiver(slot_num);
873 }
874 /* check write time */
875 if (s->wpid > 0 && !s->wkilled &&
876 now.tv_sec > s->wtime.tv_sec + timeout) {
877 PARA_INFO_LOG("%s output buffer (slot %d) not ready\n",
878 audio_formats[s->format], slot_num);
879 if (s->fci)
880 s->fci->error = 42;
881 }
882 }
883 }
884
885 static size_t get_loaded_bytes(int slot_num)
886 {
887 size_t loaded = 0;
888 struct slot_info *s = &slot[slot_num];
889 struct receiver_node *rn = s->receiver_node;
890
891 if (s->format < 0)
892 goto out;
893
894 if (afi[s->format].num_filters) {
895 if (s->fci)
896 loaded = *s->fci->out_loaded;
897 } else {
898 if (rn)
899 loaded = rn->loaded;
900 }
901 out:
902 return loaded;
903 }
904
905
906 static void close_decoder_if_idle(int slot_num)
907 {
908 struct slot_info *s = &slot[slot_num];
909 struct receiver_node *rn = s->receiver_node;
910
911 if (s->format < 0)
912 return;
913 if (!s->fci)
914 return;
915 if (!rn->eof && !s->fci->error && s->wpid > 0)
916 return;
917 if (!s->fci->error && s->wpid > 0) { /* eof */
918 if (filter_io(s->fci) > 0)
919 return;
920 if (get_loaded_bytes(slot_num))
921 return;
922 }
923 if (s->write_fd > 0) {
924 PARA_INFO_LOG("slot %d: closing write fd %d\n", slot_num,
925 s->write_fd);
926 close(s->write_fd);
927 del_close_on_fork_list(s->write_fd);
928 s->write_fd = -1;
929 }
930 if (s->wpid > 0)
931 return; /* wait until writer dies before closing filters */
932 PARA_INFO_LOG("closing all filters in slot %d (filter_chain %p)\n",
933 slot_num, s->fci);
934 close_filters(s->fci);
935 free(s->fci);
936 close_receiver(slot_num);
937 clear_slot(slot_num);
938 }
939
940 static int set_stream_fds(fd_set *wfds)
941 {
942 int i, max_fileno = -1;
943
944 check_timeouts();
945 FOR_EACH_SLOT(i) {
946 struct slot_info *s = &slot[i];
947 struct audio_format_info *a;
948 struct receiver_node *rn;
949
950 close_decoder_if_idle(i);
951 s->wcheck = 0;
952 if (s->format < 0)
953 continue;
954 a = &afi[s->format];
955 rn = s->receiver_node;
956 if (rn && rn->loaded && !s->wpid) {
957 PARA_INFO_LOG("no writer in slot %d\n", i);
958 start_stream_writer(i);
959 }
960 if (s->write_fd <= 0)
961 continue;
962 if (!get_loaded_bytes(i))
963 continue;
964 FD_SET(s->write_fd, wfds);
965 s->wcheck = 1;
966 max_fileno = MAX(s->write_fd, max_fileno);
967 }
968 // PARA_INFO_LOG("return %d\n", max_fileno);
969 return max_fileno;
970 }
971
972 static int write_audio_data(int slot_num)
973 {
974 struct slot_info *s = &slot[slot_num];
975 struct audio_format_info *a = &afi[s->format];
976 struct receiver_node *rn = s->receiver_node;
977 int rv;
978 char **buf;
979 size_t *len;
980
981 if (a->num_filters) {
982 buf = &s->fci->outbuf;
983 len = s->fci->out_loaded;
984 } else {
985 buf = &rn->buf;
986 len = &rn->loaded;
987 }
988 PARA_DEBUG_LOG("writing %p (%zd bytes)\n", *buf, *len);
989 rv = write(s->write_fd, *buf, *len);
990 PARA_DEBUG_LOG("wrote %d/%zd\n", rv, *len);
991 if (rv < 0) {
992 PARA_WARNING_LOG("write error in slot %d (fd %d): %s\n",
993 slot_num, s->write_fd, strerror(errno));
994 *len = 0;
995 s->fci->error = E_WRITE_AUDIO_DATA;
996 } else if (rv != *len) {
997 PARA_DEBUG_LOG("partial %s write (%i/%zd) for slot %d\n",
998 audio_formats[s->format], rv, *len, slot_num);
999 *len -= rv;
1000 memmove(*buf, *buf + rv, *len);
1001 } else
1002 *len = 0;
1003 if (rv > 0)
1004 gettimeofday(&s->wtime, NULL);
1005 return rv;
1006 }
1007
1008 static void slot_io(fd_set *wfds)
1009 {
1010 int ret, i;
1011
1012 FOR_EACH_SLOT(i) {
1013 struct slot_info *s = &slot[i];
1014 struct receiver_node *rn = s->receiver_node;
1015
1016 if (rn && rn->loaded)
1017 gettimeofday(&s->rtime, NULL);
1018 if (s->format >= 0 && s->write_fd > 0 && s->fci) {
1019 ret = filter_io(s->fci);
1020 if (ret < 0)
1021 s->fci->error = -ret;
1022 // PARA_DEBUG_LOG("slot %d, filter io %d bytes, check write: %d, loaded: %d/%d, eof: %d\n",
1023 // i, ret, s->wcheck, rn->loaded, *s->fci->out_loaded, rn->eof);
1024 }
1025 if (s->write_fd <= 0 || !s->wcheck || !FD_ISSET(s->write_fd, wfds))
1026 continue;
1027 write_audio_data(i);
1028 }
1029 }
1030
1031 static int parse_stream_command(const char *txt, char **cmd)
1032 {
1033 char *p = strchr(txt, ':');
1034 int i;
1035
1036 if (!p)
1037 return -E_MISSING_COLON;
1038 p++;
1039 FOR_EACH_AUDIO_FORMAT(i) {
1040 if (strncmp(txt, audio_formats[i], strlen(audio_formats[i])))
1041 continue;
1042 *cmd = p;
1043 return i;
1044 }
1045 return -E_UNSUPPORTED_AUDIO_FORMAT;
1046 }
1047
1048 static int add_filter(int format, char *cmdline)
1049 {
1050 struct audio_format_info *a = &afi[format];
1051 int filter_num, nf = a->num_filters;
1052
1053 filter_num = check_filter_arg(cmdline, &a->filter_conf[nf]);
1054 if (filter_num < 0)
1055 return filter_num;
1056 a->filters[nf] = &filters[filter_num];
1057 a->num_filters++;
1058 PARA_INFO_LOG("%s filter %d: %s\n", audio_formats[format], nf + 1,
1059 a->filters[nf]->name);
1060 return filter_num;
1061 }
1062
1063 static int setup_default_filters(void)
1064 {
1065 int i, ret = 1;
1066
1067 FOR_EACH_AUDIO_FORMAT(i) {
1068 struct audio_format_info *a = &afi[i];
1069 char *tmp;
1070 int j;
1071 if (a->num_filters)
1072 continue;
1073 /* add "dec" to audio format name */
1074 tmp = make_message("%sdec", audio_formats[i]);
1075 for (j = 0; filters[j].name; j++)
1076 if (!strcmp(tmp, filters[j].name))
1077 break;
1078 free(tmp);
1079 ret = -E_UNSUPPORTED_FILTER;
1080 if (!filters[j].name)
1081 goto out;
1082 tmp = para_strdup(filters[j].name);
1083 ret = add_filter(i, tmp);
1084 free(tmp);
1085 if (ret < 0)
1086 goto out;
1087 PARA_INFO_LOG("%s -> default filter: %s\n", audio_formats[i], filters[j].name);
1088 ret = add_filter(i, "wav");
1089 if (ret < 0)
1090 goto out;
1091 PARA_INFO_LOG("%s -> default filter: wav\n", audio_formats[i]);
1092 }
1093 out:
1094 return ret;
1095 }
1096
1097 static int init_stream_io(void)
1098 {
1099 int i, ret, receiver_num;
1100 char *cmd;
1101
1102 for (i = 0; i < conf.stream_write_cmd_given; i++) {
1103 ret = parse_stream_command(conf.stream_write_cmd_arg[i], &cmd);
1104 if (ret < 0)
1105 goto out;
1106 afi[ret].write_cmd = para_strdup(cmd);
1107 PARA_INFO_LOG("%s write command: %s\n", audio_formats[ret], afi[ret].write_cmd);
1108 }
1109 for (i = 0; receivers[i].name; i++) {
1110 PARA_INFO_LOG("initializing %s receiver\n", receivers[i].name);
1111 receivers[i].init(&receivers[i]);
1112 }
1113 for (i = 0; i < conf.receiver_given; i++) {
1114 char *arg = conf.receiver_arg[i];
1115 char *recv = strchr(arg, ':');
1116 ret = -E_MISSING_COLON;
1117 if (!recv)
1118 goto out;
1119 *recv = '\0';
1120 recv++;
1121 ret = get_audio_format_num(arg);
1122 if (ret < 0)
1123 goto out;
1124 afi[ret].receiver_conf = check_receiver_arg(recv, &receiver_num);
1125 if (!afi[ret].receiver_conf) {
1126 ret = -E_RECV_SYNTAX;
1127 goto out;
1128 }
1129 afi[ret].receiver = &receivers[receiver_num];
1130 }
1131 /* use the first available receiver with no arguments
1132 * for those audio formats for which no receiver
1133 * was specified
1134 */
1135 cmd = para_strdup(receivers[0].name);
1136 FOR_EACH_AUDIO_FORMAT(i) {
1137 struct audio_format_info *a = &afi[i];
1138 if (a->receiver_conf)
1139 continue;
1140 a->receiver_conf = check_receiver_arg(cmd, &receiver_num);
1141 if (!a->receiver_conf)
1142 return -E_RECV_SYNTAX;
1143 a->receiver = &receivers[receiver_num];
1144 }
1145 free(cmd);
1146 /* filters */
1147 filter_init(filters);
1148 FOR_EACH_AUDIO_FORMAT(i) {
1149 afi[i].filter_conf = para_malloc((conf.filter_given + 1) * sizeof(char *));
1150 afi[i].filters = para_malloc((conf.filter_given + 1) * sizeof(struct filter *));
1151 }
1152 if (!conf.no_default_filters_given)
1153 return setup_default_filters();
1154 for (i = 0; i < conf.filter_given; i++) {
1155 char *arg = conf.filter_arg[i];
1156 char *filter_name = strchr(arg, ':');
1157 ret = -E_MISSING_COLON;
1158 if (!filter_name)
1159 goto out;
1160 *filter_name = '\0';
1161 filter_name++;
1162 ret = get_audio_format_num(arg);
1163 if (ret < 0)
1164 goto out;
1165 ret = add_filter(ret, filter_name);
1166 if (ret < 0)
1167 goto out;
1168 }
1169 ret = 1;
1170 out:
1171 return ret;
1172 }
1173
1174 static int dump_commands(int fd)
1175 {
1176 char *buf = para_strdup(""), *tmp = NULL;
1177 int i;
1178 ssize_t ret;
1179
1180 FOR_EACH_COMMAND(i) {
1181 tmp = make_message("%s%s\t%s\n", buf, cmds[i].name,
1182 cmds[i].description);
1183 free(buf);
1184 buf = tmp;
1185 }
1186 ret = client_write(fd, buf);
1187 free(buf);
1188 return ret;
1189 }
1190
1191 /*
1192 * command handlers don't close their fd on errors (ret < 0) so that
1193 * its caller can send an error message. Otherwise (ret >= 0) it's up
1194 * to each individual command to close the fd if necessary.
1195 */
1196
1197 static int com_help(int fd, int argc, char **argv)
1198 {
1199 int i, ret;
1200 char *buf;
1201 const char *dflt = "No such command. Available commands:\n";
1202
1203 if (argc < 2) {
1204 ret = dump_commands(fd);
1205 goto out;
1206 }
1207 FOR_EACH_COMMAND(i) {
1208 if (strcmp(cmds[i].name, argv[1]))
1209 continue;
1210 buf = make_message(
1211 "NAME\n\t%s -- %s\n"
1212 "SYNOPSIS\n\tpara_audioc %s\n"
1213 "DESCRIPTION\n%s\n",
1214 argv[1],
1215 cmds[i].description,
1216 cmds[i].synopsis,
1217 cmds[i].help
1218 );
1219 ret = client_write(fd, buf);
1220 free(buf);
1221 goto out;
1222 }
1223 ret = client_write(fd, dflt);
1224 if (ret > 0)
1225 ret = dump_commands(fd);
1226 out:
1227 if (ret >= 0)
1228 close(fd);
1229 return ret;
1230 }
1231
1232 static int com_stat(int fd, __unused int argc, __unused char **argv)
1233 {
1234 int i, ret;
1235 char *buf = audiod_status_string();
1236
1237 buf = para_strcat(buf, "\n");
1238 for (i = RINGBUFFER_SIZE - 1; i >= 0; i--) {
1239 char *tmp, *line = ringbuffer_get(stat_item_ringbuf, i);
1240 if (!line)
1241 continue;
1242 tmp = make_message("%s\n", line);
1243 buf = para_strcat(buf, tmp);
1244 free(tmp);
1245 }
1246 ret = client_write(fd, buf);
1247 if (ret > 0)
1248 ret = stat_client_add(fd);
1249 free(buf);
1250 return ret;
1251 }
1252
1253 #if 0
1254 static char *list_filters(void)
1255 {
1256 int i, j;
1257 char *tmp, *msg = make_message("format\tnum\tcmd\n");
1258
1259 FOR_EACH_AUDIO_FORMAT(i) {
1260 for (j = 0; j < afi[i].num_filters; j++) {
1261 tmp = make_message("%s\t%i\t%s\n",
1262 afi[i].name, j, afi[i].filter_cmds[j]);
1263 msg = para_strcat(msg, tmp);
1264 free(tmp);
1265 }
1266 tmp = make_message("%s\t%i\t%s\n", afi[i].name,
1267 j, afi[i].write_cmd);
1268 msg = para_strcat(msg, tmp);
1269 free(tmp);
1270 }
1271 return msg;
1272 }
1273 #endif
1274
1275 static int com_grab(int fd, int argc, char **argv)
1276 {
1277 struct grab_client *gc;
1278 struct filter_node *fn;
1279 int err;
1280
1281 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc, argv[0], optind);
1282 gc = grab_client_new(fd, argc, argv, &err);
1283 PARA_INFO_LOG("argc: %d, argv[0]: %s, optind: %d\n", argc, argv[0], optind);
1284 if (!gc)
1285 goto err_out;
1286 fn = find_filter_node(gc->conf->slot_arg, gc->audio_format_num, gc->conf->filter_num_arg);
1287 if (fn)
1288 activate_grab_client(gc, fn);
1289 return 1;
1290 err_out:
1291 if (err != -E_GC_HELP_GIVEN)
1292 return err;
1293 err = client_write(fd, "Usage: para_audioc [audioc_options] -- "
1294 "grab [grab_options]\nAvailable options:\n");
1295 if (err < 0)
1296 return err;
1297 err = client_write(fd, GRAB_HELP_TXT);
1298 if (err < 0)
1299 return err;
1300 close(fd);
1301 return 1;
1302 }
1303
1304 static int __noreturn com_term(int fd, __unused int argc, __unused char **argv)
1305 {
1306 close(fd);
1307 clean_exit(EXIT_SUCCESS, "terminating on user request");
1308 }
1309
1310 static int com_on(int fd, __unused int argc, __unused char **argv)
1311 {
1312 audiod_status = AUDIOD_ON;
1313 close(fd);
1314 return 1;
1315 }
1316
1317 static int com_off(int fd, __unused int argc, __unused char **argv)
1318 {
1319 audiod_status = AUDIOD_OFF;
1320 close(fd);
1321 return 1;
1322 }
1323
1324 static int com_sb(int fd, __unused int argc, __unused char **argv)
1325 {
1326 audiod_status = AUDIOD_STANDBY;
1327 close(fd);
1328 return 1;
1329 }
1330
1331 static int com_cycle(int fd, int argc, char **argv)
1332 {
1333 switch (audiod_status) {
1334 case AUDIOD_ON:
1335 return com_sb(fd, argc, argv);
1336 break;
1337 case AUDIOD_OFF:
1338 return com_on(fd, argc, argv);
1339 break;
1340 case AUDIOD_STANDBY:
1341 return com_off(fd, argc, argv);
1342 break;
1343 }
1344 close(fd);
1345 return 1;
1346 }
1347
1348 static int check_perms(struct ucred *c)
1349 {
1350 int i;
1351
1352 if (!conf.user_allow_given)
1353 return 1;
1354 for (i = 0; i < conf.user_allow_given; i++)
1355 if (c->uid == conf.user_allow_arg[i])
1356 return 1;
1357 return -E_UCRED_PERM;
1358 }
1359
1360 static int handle_connect(void)
1361 {
1362 int i, argc, ret, clifd = -1;
1363 struct ucred c;
1364 char *buf = para_malloc(MAXLINE), **argv = NULL;
1365 struct sockaddr_un unix_addr;
1366
1367 ret = para_accept(audiod_socket, &unix_addr, sizeof(struct sockaddr_un));
1368 if (ret < 0)
1369 goto out;
1370 clifd = ret;
1371 ret = recv_cred_buffer(clifd, buf, MAXLINE - 1, &c);
1372 if (ret < 0)
1373 goto out;
1374 PARA_INFO_LOG("pid: %i, uid: %i, gid: %i, ret: %i, buf: %s\n", c.pid, c.uid, c.gid, ret, buf);
1375 buf[ret] = '\0';
1376 ret = check_perms(&c);
1377 if (ret < 0)
1378 goto out;
1379 argc = split_args(buf, &argv, '\n');
1380 PARA_INFO_LOG("argv[0]: %s\n", argv[0]);
1381 for (i = 0; cmds[i].name; i++) {
1382 if (strcmp(cmds[i].name, argv[0]))
1383 continue;
1384 ret = cmds[i].handler(clifd, argc + 1, argv);
1385 goto out;
1386 }
1387 ret = -E_INVALID_AUDIOD_CMD; /* cmd not found */
1388 out:
1389 free(buf);
1390 free(argv);
1391 if (clifd > 0 && ret < 0 && ret != -E_CLIENT_WRITE) {
1392 char *tmp = make_message("%s\n", PARA_STRERROR(-ret));
1393 client_write(clifd, tmp);
1394 free(tmp);
1395 close(clifd);
1396 }
1397 return ret;
1398 }
1399
1400 static void audiod_get_socket(void)
1401 {
1402 struct sockaddr_un unix_addr;
1403
1404 if (conf.socket_given)
1405 socket_name = para_strdup(conf.socket_arg);
1406 else {
1407 char *hn = para_hostname();
1408 socket_name = make_message("/var/paraslash/audiod_socket.%s",
1409 hn);
1410 free(hn);
1411 }
1412 PARA_NOTICE_LOG("connecting to local socket %s\n", socket_name);
1413 if (conf.force_given)
1414 unlink(socket_name);
1415 audiod_socket = create_pf_socket(socket_name, &unix_addr,
1416 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IWOTH);
1417 if (audiod_socket < 0) {
1418 PARA_EMERG_LOG("%s", "can not connect to socket\n");
1419 exit(EXIT_FAILURE); /* do not unlink socket */
1420 }
1421 if (listen(audiod_socket, 5) < 0) {
1422 PARA_EMERG_LOG("%s", "can not listen on socket\n");
1423 exit(EXIT_FAILURE); /* do not unlink socket */
1424 }
1425 add_close_on_fork_list(audiod_socket);
1426 }
1427
1428 static int open_stat_pipe(void)
1429 {
1430 int ret, fd[3] = {-1, 1, 0};
1431 char *argv[] = {BINDIR "/para_client", "stat", NULL};
1432 pid_t pid;
1433 ret = para_exec(&pid, BINDIR "/para_client", argv, fd);
1434 if (ret >= 0) {
1435 ret = fd[1];
1436 PARA_NOTICE_LOG("stat pipe opened, fd %d\n", ret);
1437 add_close_on_fork_list(ret);
1438 } else
1439 clean_exit(EXIT_FAILURE, "failed to open status pipe");
1440 return ret;
1441 }
1442
1443 static int pre_select(fd_set *rfds, fd_set *wfds, struct timeval *tv)
1444 {
1445 int i, ret, max = -1;
1446
1447 FOR_EACH_SLOT(i) {
1448 struct slot_info *s = &slot[i];
1449 struct audio_format_info *a;
1450 struct receiver_node *rn = s->receiver_node;
1451 if (s->format < 0 || !rn)
1452 continue;
1453 a = &afi[s->format];
1454 ret = a->receiver->pre_select(rn, rfds, wfds, tv);
1455 // PARA_NOTICE_LOG("%s preselect: %d\n", a->receiver->name, ret);
1456 max = MAX(max, ret);
1457 }
1458 return max;
1459
1460 }
1461 static void audiod_post_select(int select_ret, fd_set *rfds, fd_set *wfds)
1462 {
1463 int i, ret;
1464
1465 FOR_EACH_SLOT(i) {
1466 struct slot_info *s = &slot[i];
1467 struct audio_format_info *a;
1468 struct receiver_node *rn = s->receiver_node;
1469 if (s->format < 0 || !rn || rn->eof)
1470 continue;
1471 a = &afi[s->format];
1472 ret = a->receiver->post_select(rn, select_ret, rfds, wfds);
1473 if (ret <= 0) {
1474 if (ret)
1475 PARA_ERROR_LOG("%s post select failed: %s (slot %d)\n",
1476 a->receiver->name, PARA_STRERROR(-ret), i);
1477 else
1478 PARA_INFO_LOG("eof in slot %d\n", i);
1479 rn->eof = 1;
1480 }
1481 if (ret < 0 && s->fci)
1482 s->fci->error = ret;
1483 }
1484 }
1485
1486 /* TODO: move everything before the select call to pre_select() */
1487 static void __noreturn audiod_mainloop(void)
1488 {
1489 fd_set rfds, wfds;
1490 int ret, max_fileno, sbo = 0;
1491 char status_buf[STRINGSIZE] = "";
1492 struct timeval tv;
1493 repeat:
1494 FD_ZERO(&rfds);
1495 FD_ZERO(&wfds);
1496 max_fileno = 0;
1497 if (audiod_status != AUDIOD_ON)
1498 kill_all_decoders();
1499 else if (playing)
1500 start_current_receiver();
1501 max_fileno = set_stream_fds(&wfds);
1502 /* stat pipe (read) */
1503 if (stat_pipe >= 0 && audiod_status == AUDIOD_OFF)
1504 close_stat_pipe();
1505 if (stat_pipe < 0 && audiod_status != AUDIOD_OFF) {
1506 stat_pipe = open_stat_pipe();
1507 sbo = 0;
1508 status_buf[0] = '\0';
1509 }
1510 if (stat_pipe >= 0 && audiod_status != AUDIOD_OFF) {
1511 FD_SET(stat_pipe, &rfds);
1512 max_fileno = MAX(max_fileno, stat_pipe);
1513 }
1514 /* always check signal pipe */
1515 FD_SET(signal_pipe, &rfds);
1516 max_fileno = MAX(max_fileno, signal_pipe);
1517 /* local socket */
1518 if (audiod_socket < 0)
1519 audiod_get_socket(); /* doesn't return on errors */
1520 FD_SET(audiod_socket, &rfds);
1521 max_fileno = MAX(max_fileno, audiod_socket);
1522 tv.tv_sec = 0;
1523 tv.tv_usec = 200 * 1000;
1524 ret = pre_select(&rfds, &wfds, &tv);
1525 max_fileno = MAX(max_fileno, ret);
1526 ret = select(max_fileno + 1, &rfds, &wfds, NULL, &tv);
1527 if (ret < 0 && errno != EINTR)
1528 PARA_ERROR_LOG("select returned %d (%s)\n", ret,
1529 strerror(errno));
1530 if (audiod_status != AUDIOD_OFF)
1531 audiod_status_dump();
1532 if (ret < 0)
1533 goto repeat;
1534 audiod_post_select(ret, &rfds, &wfds);
1535 /* read status pipe */
1536 if (stat_pipe >=0 && FD_ISSET(stat_pipe, &rfds)) {
1537 ret = read(stat_pipe, status_buf + sbo, STRINGSIZE - 1 - sbo);
1538 if (ret <= 0) {
1539 close_stat_pipe();
1540 /* avoid busy loop if server is down */
1541 while (sleep(1) > 0)
1542 ; /* try again*/
1543 } else {
1544 status_buf[ret + sbo] = '\0';
1545 sbo = for_each_line(status_buf, ret + sbo,
1546 &check_stat_line);
1547 }
1548 }
1549 slot_io(&wfds);
1550 if (FD_ISSET(audiod_socket, &rfds)) {
1551 ret = handle_connect();
1552 if (ret < 0) {
1553 PARA_ERROR_LOG("%s\n", PARA_STRERROR(-ret));
1554 }
1555 }
1556 /* signals */
1557 if (FD_ISSET(signal_pipe, &rfds)) {
1558 int sig_nr = para_next_signal();
1559 if (sig_nr > 0)
1560 handle_signal(sig_nr);
1561 }
1562 goto repeat;
1563 }
1564
1565 static void set_initial_status(void)
1566 {
1567 audiod_status = AUDIOD_ON;
1568 if (!conf.mode_given)
1569 return;
1570 if (!strcmp(conf.mode_arg, "sb")) {
1571 audiod_status = AUDIOD_STANDBY;
1572 return;
1573 }
1574 if (!strcmp(conf.mode_arg, "off")) {
1575 audiod_status = AUDIOD_OFF;
1576 return;
1577 }
1578 if (strcmp(conf.mode_arg, "on"))
1579 PARA_WARNING_LOG("%s", "invalid mode\n");
1580 }
1581
1582 int __noreturn main(int argc, char *argv[])
1583 {
1584 char *cf;
1585 int i;
1586
1587 valid_fd_012();
1588 hostname = para_hostname();
1589 cmdline_parser(argc, argv, &conf);
1590 para_drop_privileges(conf.user_arg);
1591 cf = configfile_exists();
1592 if (cf) {
1593 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0)) {
1594 fprintf(stderr, "parse error in config file\n");
1595 exit(EXIT_FAILURE);
1596 }
1597 }
1598 log_welcome("para_audiod", conf.loglevel_arg);
1599 i = init_stream_io();
1600 if (i < 0) {
1601 fprintf(stderr, "init stream io error: %s\n",
1602 PARA_STRERROR(-i));
1603 exit(EXIT_FAILURE);
1604 }
1605 server_uptime(UPTIME_SET);
1606 set_initial_status();
1607 FOR_EACH_SLOT(i)
1608 clear_slot(i);
1609 stat_item_ringbuf = ringbuffer_new(RINGBUFFER_SIZE);
1610 init_grabbing();
1611 setup_signal_handling();
1612 if (conf.daemon_given)
1613 daemon_init();
1614 audiod_mainloop();
1615 }